diff --git a/lib/requests/sharing-request.js b/lib/requests/sharing-request.js
index 8a52fc57..c67c7df2 100644
--- a/lib/requests/sharing-request.js
+++ b/lib/requests/sharing-request.js
@@ -64,10 +64,11 @@ class SharingRequest extends AuthRequest {
    * @param req {IncomingRequest}
    * @param res {ServerResponse}
    */
-  static async get (req, res) {
+  static async get (req, res, next) {
     const request = SharingRequest.fromParams(req, res)
 
     const appUrl = request.getAppUrl()
+    if (!appUrl) return next()
     const appOrigin = appUrl.origin
     const serverUrl = new url.URL(req.app.locals.ldp.serverUri)
 
@@ -153,6 +154,7 @@ class SharingRequest extends AuthRequest {
   }
 
   getAppUrl () {
+    if (!this.authQueryParams.redirect_uri) return
     return new url.URL(this.authQueryParams.redirect_uri)
   }